diff --git a/lib/easypost/errors.rb b/lib/easypost/errors.rb
index 8c6c91e2..b735e4e1 100644
--- a/lib/easypost/errors.rb
+++ b/lib/easypost/errors.rb
@@ -12,6 +12,7 @@ module EasyPost::Errors
 require_relative 'errors/missing_parameter_error'
 require_relative 'errors/signature_verification_error'
 require_relative 'errors/api/api_error'
+require_relative 'errors/api/bad_request_error'
 require_relative 'errors/api/connection_error'
 require_relative 'errors/api/forbidden_error'
 require_relative 'errors/api/gateway_timeout_error'